Add type to device manifest.

Test: pass
Change-Id: I683e9dfcf510848b546e44fec79f6a0349f82838
diff --git a/manifest.xml b/manifest.xml
index 478672f..b4e4064 100644
--- a/manifest.xml
+++ b/manifest.xml
@@ -1,4 +1,4 @@
-<manifest version="1.0">
+<manifest version="1.0" type="device">
     <hal format="hidl">
         <name>android.hardware.graphics.allocator</name>
         <transport>hwbinder</transport>